FILE - This Feb. 5, 2011, file photo shows Steve Sabol during an interview in Dallas. This year’s “Hard Knocks” series with the Dallas Cowboys will mark the first time one of its teams is in the Hall of Fame Game. It is fitting since the creator of the series was enshrined into the Hall earlier this year. “Hard Knocks” is one of Steve Sabol’s many legacies at NFL Films that continue to live on. (AP Photo/Tony Gutierrez, File)

FILE - In this Sept. 26, 2000, file photo, NFL Films President Steve Sabol poses at his desk with an old 16mm movie camera while the company's new live Internet program airs on the computer screen behind him at their headquarters in Mount Laurel, N.J. Sabol was the creative force at NFL Films. Sabol joins his father, Ed, as the third father/son duo inducted into the Pro Football Hall of Fame. His father was enshrined in 2011. (AP Photo/Daniel Hulshizer, File)

FILE - In this Sept. 24, 2012, file photo, a tribute to NFL Films' Steve Sabol is shown during an NFL football game between the Green Bay Packers and the Seattle Seahawks in Seattle. “Hard Knocks,” which started 20 years ago, is one of Steve Sabol's many legacies at NFL Films that continue to live on. Sabol, who was 69 when he died from brain cancer in 2012, is one of three contributors that are part of the Hall's 2020 Centennial Class. (AP Photo/Ted S. Warren, File)